We just released an update to the WordPress plugin that adds an optional setting for preserving logs of send attempts. It adds a new Logs tab that can be used to view the last 7 days of plugin sending activity.

You can check if your contact form or plugin generating emails is actually using wp_mail for sending - no log entry means it is not using wp_mail and therefore not compatible with Postmark for WordPress.

API responses are included, so you can see why send attempt(s) fail.

We heard a lot of feedback from users saying their plugin wasn't working but they had no idea why, and there was not an easy way to tell what was going wrong. Now, you can quickly see what is going on and resolve the more common errors, like trying to send from an address that isn't on your account yet, or trying to send to external recipients before you Postmark account is approved.